c語言結(jié)構(gòu)體數(shù)組初始化
加入技術(shù)交流群
struct _m_usmart_nametab usmart_nametab[]=
本文引用地址：http://www.ex-cimer.com/article/201611/322298.htm{#if USMART_USE_WRFUNS==1 //如果使能了讀寫操作
(void*)read_addr,"u32 read_addr(u32 addr)",
(void*)write_addr,"void write_addr(u32 addr,u32 val)",
#endif
(void*)delay_ms,"void delay_ms(u16 nms)",
(void*)delay_us,"void delay_us(u32 nus)",
(void*)LCD_Clear,"void LCD_Clear(u16 Color)",
(void*)LCD_Fill,"void LCD_Fill(u16 xsta,u16 ysta,u16 xend,u16 yend,u16 color)",
(void*)LCD_DrawLine,"void LCD_DrawLine(u16 x1, u16 y1, u16 x2, u16 y2)",
(void*)LCD_DrawRectangle,"void LCD_DrawRectangle(u16 x1, u16 y1, u16 x2, u16 y2)",
(void*)Draw_Circle,"void Draw_Circle(u16 x0,u16 y0,u8 r)",
(void*)LCD_ShowNum,"void LCD_ShowNum(u16 x,u16 y,u32 num,u8 len,u8 size)",
(void*)LCD_ShowString,"void LCD_ShowString(u16 x,u16 y,u16 width,u16 height,u8 size,u8 *p)",
(void*)LCD_ReadPoint,"u16 LCD_ReadPoint(u16 x,u16 y)",
(void*)fsmc_sram_test_write,"void fsmc_sram_test_write(u8 data,u32 addr)",
(void*)fsmc_sram_test_read,"u8 fsmc_sram_test_read(u32 addr)",
(void*)mymalloc,"void *mymalloc(u8 memx,u32 size)",
(void*)myfree,"void myfree(u8 memx,void *ptr)",
(void*)mf_mount,"u8 mf_mount(u8 drv)",
(void*)mf_open,"u8 mf_open(u8*path,u8 mode)",
(void*)mf_close,"u8 mf_close(void)",
(void*)mf_read,"u8 mf_read(u16 len)",
(void*)mf_write,"u8 mf_write(u8*dat,u16 len)",
(void*)mf_opendir,"u8 mf_opendir(u8* path)",
(void*)mf_readdir,"u8 mf_readdir(void)",
(void*)mf_scan_files,"u8 mf_scan_files(u8 * path)",
(void*)mf_showfree,"u32 mf_showfree(u8 *drv)",
(void*)mf_lseek,"u8 mf_lseek(u32 offset)",
(void*)mf_tell,"u32 mf_tell(void)",
(void*)mf_size,"u32 mf_size(void)",
(void*)mf_mkdir,"u8 mf_mkdir(u8*pname)",
(void*)mf_fmkfs,"u8 mf_fmkfs(u8 drv,u8 mode,u16 au)",
(void*)mf_unlink,"u8 mf_unlink(u8 *pname)",
(void*)mf_rename,"u8 mf_rename(u8 *oldname,u8* newname)",
(void*)mf_gets,"void mf_gets(u16 size)",
(void*)mf_putc,"u8 mf_putc(u8 c)",
(void*)mf_puts,"u8 mf_puts(u8*c)",
};
_m_usmart_nametab的結(jié)構(gòu)體如下
//函數(shù)名列表
struct _m_usmart_nametab
{
void* func; //函數(shù)指針
const u8* name; //函數(shù)名(查找串)
};
一開始一直不明白，為什么下邊的只有兩個(gè)參數(shù)，而上邊的確有那么多，難道不是一一對應(yīng)？
其實(shí)上邊的是一個(gè)table表，就像 u8 table[]={}；
而上邊的定義的是一個(gè)結(jié)構(gòu)體的數(shù)組，其成員很多。但每一個(gè)成員應(yīng)該和結(jié)構(gòu)體類型一致，這只不是定義一個(gè)這樣結(jié)構(gòu)類型的結(jié)構(gòu)體數(shù)組而已。
看下面例子
typedef struct _TEST_T {
int i;
char c[10];
}TEST_T;
TEST_T gst = {1, “12345”};//可以初始化，設(shè)置i為1，s為一個(gè)字符串.
TEST_T gst = {1};//初始化個(gè)數(shù)少于實(shí)際個(gè)數(shù)時(shí)，只初始化前面的成員。
TEST_Tgst = {.c=“12345”};//有選擇的初始化成員。
復(fù)合字面量。
gst = (TEST_T){122, "1256"};//這是一個(gè)賦值語句，也可以作為初始化?？梢猿霈F(xiàn)在程序的任何地方。
當(dāng)然也可以使用復(fù)合字面量來初始化：
gst = (TEST_T){.i=122, .c="123"};
3、結(jié)構(gòu)體數(shù)組
可以用多個(gè)大括號括起來：
TEST_T gst[10] = {{},{},{},{}}
也可以初始化其中的一個(gè)元素：
TEST_T gst[10] = {[2]={}, [3]={}}
也可以使用復(fù)合字面量：
TEST_T gst[10] = {[2].i=0, [3].i={}}
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